JP4200851B2 - Mounting jig for hole forming pin for indwelling needle insertion - Google Patents

Description

  The present invention relates to a mounting tool for inserting and mounting an indwelling needle insertion hole forming pin from the skin surface of a human body to a blood vessel wall or in the immediate vicinity thereof.

Hemodialysis patients generally need to perform hemodialysis at a pace of 2 to 3 times a week, and puncturing an indwelling needle each time has been a considerable pain for the patient.
Therefore, in order to minimize this puncture pain, the present applicant has already proposed a hole forming pin for indwelling needle insertion. (Refer to Design Registration Nos. 1136452, 1137743, 1138667, and 1140387) These consist of a cylindrical insertion portion having a rounded tip and an insertion stop provided at the base end of the insertion portion. The insertion stop portion is formed with a holding portion (concave portion) for holding the pin by inserting the distal end portion of the insertion assisting tool.
When these indwelling needle insertion hole forming pins are inserted from the skin surface to the blood vessel wall or in the immediate vicinity thereof and left in place for several days, a hole (hereinafter referred to as a “button hole”) that becomes a passage for inserting the indwelling needle It is formed. Since the indwelling needle may be inserted along this buttonhole at the time of subsequent puncture, the puncture pain that occurs at the time of puncture other than the buttonhole puncture method is considerably eliminated.

JP 2002-306593 A (pages 2 to 3) Design registration No. 1 136552, 1137743, 1138667, 1140387

  However, in the case of an insertion aid used to insert such a conventional indwelling needle insertion hole-forming pin from the skin surface to the blood vessel wall or the immediate vicinity thereof, an insertion aid that is not required after the hole-forming pin is attached (wearing) In order to remove the device from the forming pin mounted on the skin surface, it has to be separated using a medical hook-like hook or tweezers, which is problematic in that it takes time and effort.

  The present invention has been made in view of such circumstances, and at the same time when the hole forming pin is inserted and attached to the puncture wound immediately after the indwelling needle for dialysis is pulled out, the holding portion < The operability is improved by pulling the insertion assisting tool (mounting tool) away from the recess>.

  As a result of various intensive studies to solve the above problems, the present inventors have inserted and installed the indwelling needle insertion hole forming pin and at the same time supported the mounting tool supporting the indwelling needle insertion hole forming pin. The present invention has been achieved by providing a mechanism for quickly retracting the part.

  That is, the present invention is a mounting jig for mounting an indwelling needle insertion hole forming pin for indwelling an indwelling needle from the skin surface to the blood vessel, from the skin surface to the blood vessel. It consists of a sliding body that is incorporated in the main body and slides in the length direction of the main body. A sliding shaft protrudes from the tip of the main body, and the sliding body is inserted in a slidable state. The tip portion of the shaft is fitted to a holding portion formed on the opposite side of the protruding side of the insertion portion of the indwelling needle insertion hole forming pin so that the indwelling needle insertion hole forming pin is supported. .

  According to the present invention, the sliding body incorporated in the mounting jig body from the skin surface toward the blood vessel in a state where the holding portion of the indwelling needle insertion hole forming pin is securely fitted and supported on the projected sliding shaft Therefore, the hole forming pin can be smoothly inserted into and attached to the buttonhole without instability as with fingertips.

  Note that the sliding shaft is not limited to the tip of the mounting jig body, but the sliding shaft protrudes from the tip of the sliding body and slides on the tip of the body. The present invention is also applied to a configuration in which the hole forming pin is inserted and the tip of the sliding shaft is fitted to the holding portion of the hole forming pin so that the hole forming pin is supported.

The mounting jig for the indwelling needle insertion hole forming pin is integrally formed with two opposing side plates parallel to the main body, and the sliding body is inserted between the two side plates to constitute the main body. The inner wall of the two side plates and the outer wall constituting the sliding body are meshed with each other so that the sliding body can be slid forward of the main body by guide means formed in the sliding direction, or Both ends of the two elastic arm-like spring materials bent outward of the main body and the sliding body are fixed to the outer wall and the outer wall of the sliding body, respectively, and both end portions of the spring material generated as the spring material expands and contracts. The thing by which the sliding body was made slidable by the difference in distance between them is applied.
In addition, the front of the main body in the description of the mounting jig of the present application refers to the side on which the indwelling needle insertion hole forming pin is attached and the forming pin is mounted from the skin surface toward the blood vessel.

  And in the mounting jig for the hole forming pin for indwelling needle insertion according to the present application, when the sliding body is provided with a finger hook portion for sliding the sliding body along the main body, the main body of the mounting jig is Since the hole forming pin can be easily inserted and mounted from the skin surface to the blood vessel by the movement of the finger while grasping, it is excellent in operability.

  Furthermore, in the mounting jig for the indwelling needle insertion hole forming pin according to the present application, as the sliding body slides, the sliding shaft is relatively retracted from the sliding body toward the rear of the main body, and is placed from the tip end of the sliding shaft. When the pin for hole formation for needle insertion is removed, the mounting tool can be pulled away from the holding part of the hole formation pin at the same time as the hole formation pin is inserted and mounted. It will be excellent.

The mounting jig for the indwelling needle insertion hole forming pin of the present invention is a mounting jig for mounting the indwelling needle insertion hole forming pin for indwelling the indwelling needle from the skin surface to the blood vessel toward the blood vessel from the skin surface. The mounting jig is composed of a main body and a sliding body that is incorporated in the main body and slides in the length direction of the main body, and a sliding shaft protrudes from the tip of the main body, and the sliding body slides on the sliding shaft. The tip of the sliding shaft is inserted in a possible state, and the indwelling needle insertion hole forming pin is supported by fitting the holding part formed on the opposite side of the insertion part protruding side of the indwelling needle insertion hole forming pin. Incorporated into the mounting jig body from the skin surface toward the blood vessel with the holding part of the hole forming pin for inserting the indwelling needle securely fitted and supported by the protruding sliding shaft Inserted by the movement of the sliding body No instability, such as in the case of performing preferable since it easily mounted can be inserted smoothly hole forming pins on the buttonhole. In the mounting jig for the indwelling needle insertion hole forming pin according to the present application, when the sliding body is provided with a finger hook portion for sliding the sliding body along the main body, the main body of the mounting jig is gripped. However, since the hole-forming pin can be easily inserted and mounted from the skin surface to the blood vessel by finger movement, the operability is excellent.
Furthermore, in the mounting jig for the indwelling needle insertion hole forming pin according to the present application, as the sliding body slides, the sliding shaft is relatively retracted from the sliding body to the rear of the main body, and is placed from the tip end of the sliding shaft. When the pin for hole formation for needle insertion is removed, the mounting tool can be pulled away from the holding part of the hole formation pin at the same time as the hole formation pin is inserted and mounted. It will be excellent.

A preferred embodiment of the mounting jig for the indwelling needle insertion hole forming pin according to the present application will be described below with reference to FIGS.
In the figure, 1 is a hole forming pin for indwelling needle insertion, and the insertion stop portion 12 of the indwelling needle insertion hole forming pin 1 is opposite to the insertion portion 11 where the hole forming pin 1 is inserted from the skin surface toward the blood vessel. A holding portion 12 (concave portion) is formed on the side.
On the other hand, the mounting jig has a main body 2 constituting the mounting jig and a sliding body 3 that is incorporated in the main body 2 and slides in the length direction, and an indwelling needle insertion hole is formed at the tip of the main body 2. A sliding shaft 21 that is fitted to the holding portion 12 of the pin 1 protrudes. The sliding body 3 is formed with finger hanging portions (33, 34), and the sliding body 3 can be easily slid relative to the main body 2 by pressing the finger hanging portions with a fingertip.

First, the indwelling needle insertion hole forming pin 1 inserted from the skin surface toward the blood vessel using the indwelling needle insertion hole forming pin mounting jig of the present invention will be described.
In the drawing, the columnar insertion portion 11 has a shape with a curved tip at a tip so as not to damage a buttonhole wall or other portion formed in a portion punctured by an indwelling needle. And, in order to form a hole to the extent that an indwelling needle having a non-sharp tip can be inserted, the outer diameter of the insertion portion 1 is preferably about 0.5 to 3.0 mm, depending on the type of indwelling needle depending on the application, Generally, 1.0 to 2.0 mm is more preferable. In addition, when the indwelling needle insertion hole forming pin is indwelled, the length of the pin reaches about 3 to 20 mm in order to reach the blood vessel wall or the immediate vicinity thereof, and 4.0 to 6.0 mm is more preferable. .

  The insertion stop portion 12 is provided so that the insertion portion 11 is not buried in the skin and the formation of the buttonhole entrance is not incomplete, and the shape thereof is a spherical shape, a flat plate shape, a conical shape, an egg shape, or the like. Is done. And as a cross-sectional shape of the horizontal direction (direction parallel to the skin surface to contact) of the insertion stop part 12, what is necessary is just to have a part (maximum diameter part) larger than the outer diameter of the insertion part 11, and the maximum diameter is, for example, a sphere In the case of the shape, about 2 to 10 mmφ is preferable, and 3.0 to 5.0 mmφ is more preferable.

As a forming material of the indwelling needle insertion hole forming pin 1, an injection molded product using a thermoplastic synthetic resin such as polyurethane, polypropylene, polycarbonate, ABS resin, polyethylene, polytetrafluoroethylene, polysulfone or the like is preferably used. Alternatively, examples of the forming material include casting made of an alloy having excellent corrosion resistance and metals such as stainless steel.
Further, those obtained by coating or kneading an antithrombotic material or an antibacterial material on the above materials are also preferably employed.

Here, the method of using the indwelling needle insertion hole forming pin 1 described above will be described with an example of treatment with a dialysis indwelling needle.
First, a dialysis indwelling needle having a sharp tip is inserted into a patient's vein to start a treatment such as dialysis, and then the dialysis indwelling needle is withdrawn after hemodialysis is completed. Immediately after the indwelling needle for dialysis is pulled out, a puncture wound is formed and a passage is formed, and an indwelling needle insertion hole forming pin is inserted along this passage. If the hole forming pin is left for several days and then removed, a button hole for insertion of the indwelling needle from the skin surface to the inside of the blood vessel is formed up to or near the blood vessel wall. Therefore, when the blood vessel wall is punctured only once with the puncture needle during the second treatment, the skin surface can be penetrated into the blood vessel. When not in use, the buttonhole is clogged with coagulated or semi-coagulated blood, and the buttonhole inlet has a small scab surface. When placing a dialysis indwelling needle in this buttonhole, a medical spear hook Remove the scab with or tweezers and insert the indwelling needle into the buttonhole.

  Next, details of the mounting jig for the indwelling needle insertion hole forming pin of the present invention will be described with reference to FIGS. Here, examples of two embodiments are shown in FIG. 1 and FIG. 3, (a): a state in which an indwelling needle insertion hole forming pin is attached, (b); FIG. 2 is an exploded view of the embodiment shown in FIG. 1, and FIG. 4 shows the structure of the embodiment shown in FIG. It is a side view for demonstrating the operation | movement of FIG.

In the first embodiment of the mounting jig for the indwelling needle insertion hole forming pin of the present invention shown in FIG. 1 (FIG. 2), the mounting jig is incorporated in the main body 2 and the main body 2 in the length direction of the main body 2. The main body 2 is integrally formed by connecting the bottoms of two parallel side plates 22 parallel to each other, and a guide groove 23 is formed on each inner wall of the two side plates 22. The sliding body 3 fitted between the two side plates 22 is engaged with the guide grooves 23 of the main body 2 in the sliding direction so that the sliding edges 33 on the left and right sides of the sliding body 3 are in front of the main body 2. Is slidable. A sliding shaft 21 protrudes from the tip of the main body 2, and the sliding shaft 21 is slidably inserted into an insertion hole 32 formed in the front plate 31 of the sliding body 3. The distal end portion 21 is fitted into the holding portion 12 formed on the indwelling needle insertion hole forming pin 1 so that the indwelling needle insertion hole forming pin 1 is supported on the distal end portion of the sliding shaft 21. .
In addition, a finger hook portion 34 as a driving means is formed on the upper portion of the sliding body 3, and the sliding body 3 is slid by a fingertip of a hand holding the main body 2, and in the example of the present embodiment, the sliding body 3 As the sliding body 3 slides, the shaft 21 is relatively retracted from the sliding body toward the rear of the main body at the insertion hole 32 formed in the front plate 31 of the sliding body 3. The length and the sliding distance of the sliding shaft 21 are adjusted so that the hole forming pin 1 is removed from the sliding shaft 21. Therefore, when the mounting tool of the present invention is used, the mounting tool can be pulled away from the holding portion of the hole forming pin at the same time as the hole forming pin 1 is inserted and mounted. In order to remove from the formed pin, there is no need to perform an operation of separation using a medical hook-like hook or tweezers, and the operability is extremely excellent.

  In the example of the present embodiment, the above-described adjustment method of the sliding distance is performed, for example, by the projection 35 protruding on the back surface of the sliding body 3 as shown in FIG. 2B connecting the two side plates 22 of the main body 2. The length of the notch 25 formed on the connecting plate 24 is adjusted by a sliding stop means that hits the end of the notch 25 as it slides, or the length of the guide groove 23 or the sliding edge 33 It is only necessary to provide a sliding stop means that regulates the sliding distance by forming only a length corresponding to the length necessary for sliding.

In the second embodiment of the mounting jig for the indwelling needle insertion hole forming pin of the present invention shown in FIG. 3 (FIG. 4), the sliding body 3 is attached to the sliding shaft 21 protruding from the distal end portion of the main body 2. The ends of the two elastic arm-shaped spring members 30 that are slidably inserted and bent outwardly of the main body 2 and the sliding body 3 are fixed to the left and right side walls 22 of the main body 2 and the left and right side walls 31 of the sliding body 3, respectively. The spring member 30 can be bent via the pin coupling portion 301 so that the sliding body 3 is slid by the difference in distance between both ends of the spring member 30 caused by expansion and contraction of the spring member 30. Has been made. The pin coupling portion 301 of the spring member 30 is formed with a finger hooking portion 34 as a driving means. The sliding member 3 slides when the finger hooking portions 34 on both sides are pushed by the fingertips. It slides with respect to the slide shaft 21.
The tip of the sliding shaft 21 is fitted into a holding portion 12 formed on the indwelling needle insertion hole forming pin 1 so that the indwelling needle insertion hole forming pin 1 is supported. As the sliding body 3 slides, the insertion hole 32 formed in the front plate 31 of the sliding body 3 is relatively retracted from the sliding body to the rear of the main body so that a hole is formed from the tip of the sliding shaft 21. The forming pin 1 is detached as in the first embodiment. In other words, the adjustment method of the sliding distance in the example of the present embodiment is such that, as shown in FIG. 4, the sliding is performed when the spring material 30 that has been bent when the finger-hanging portion 34 is pressed is almost extended. The sliding shaft 21 is arranged such that the tip of the shaft 21 is retracted to the rear of the main body at the insertion hole 32 formed in the sliding body 3 and the hole forming pin 1 is detached from the tip of the sliding shaft 21. The length and sliding distance are adjusted.

  In the examples of the first and second embodiments, the sliding shaft has been described as being provided at the tip of the body of the mounting jig. However, the present invention is not limited to that. The sliding shaft protrudes from the tip of the sliding body and is inserted into the tip of the main body in a slidable state. The tip of the sliding shaft protrudes from the insertion portion of the indwelling needle insertion hole forming pin. The indwelling needle insertion hole forming pin may be supported by being fitted to a holding portion formed on the side opposite to the side.

  As the material for forming the mounting jig described above, the parts such as the main body, the sliding body, and the other finger-hanging part are generally formed by using an injection molded product made of a thermoplastic synthetic resin, which is excellent in economic efficiency. Corrosion-resistant metal material or the like is also preferably used as the elastic arm-like spring material as in the second embodiment, or in both the first and second embodiments, the alloy material is cast, and the cut product is made of a metal material. Etc. may be used.

  In the above description, the hole forming pin for inserting an indwelling needle for dialysis has been described. However, the mounting tool for the hole forming pin for indwelling needle insertion of the present application is not limited to the use for dialysis, for example, periodic sampling such as blood sampling. It is also used for applications such as continuous inspection and continuous and intermittent drug administration (infusion, etc.), and the setting of the material and dimensions of the insertion part of the indwelling needle hole forming pin according to the application is made according to the purpose of use. Widely applied.

It is a perspective view showing an example of an embodiment of a mounting jig of a hole forming pin for indwelling needle insertion of the present invention. FIG. 2 is an exploded view of the example embodiment of FIG. 1. It is a perspective view showing the other embodiment of the mounting jig of the hole formation pin for indwelling needle insertion of this invention. It is a side view explaining operation | movement of the example of an embodiment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indwelling needle insertion hole forming pin 11 Insertion part 12 Insertion stop part 121 Holding part 2 Main body 21 Sliding shaft 22 Side plate 23 Guide groove 24 Connecting plate 25 Notch part 3 Sliding body 31 Front plate 32 Insertion hole 33 Sliding edge 34 Finger hook Part 35 Projection 30 Spring material 301 Pin coupling part

Claims (5)

A mounting jig for mounting an indwelling needle insertion hole forming pin for indwelling the indwelling needle from the skin surface to the blood vessel toward the blood vessel from the skin surface,
This mounting jig consists of a main body and a sliding body that is incorporated in the main body and slides in the length direction of the main body.
A sliding shaft protrudes from the tip of the main body, and the sliding body is inserted in a slidable state.
The tip of the sliding shaft is fitted to a holding part formed on the side opposite to the protruding side of the insertion part of the indwelling needle insertion hole forming pin so that the indwelling needle insertion hole forming pin is supported,
As the sliding body slides, the sliding shaft is relatively retracted from the sliding body to the rear of the main body, and the pin for forming the indwelling needle insertion hole is detached from the tip of the sliding shaft. /> Mounting jig for hole forming pin for indwelling needle insertion. The sliding shaft protrudes from the distal end portion of the sliding body instead of the distal end portion of the main body according to claim 1, and is inserted into the distal end portion of the main body so as to be slidable. The indwelling needle insertion hole forming pin is adapted to be supported by the holding part formed on the opposite side to the protruding side of the insertion part of the indwelling needle insertion hole forming pin. Mounting jig. Two parallel side plates parallel to each other are integrally formed on the main body, and the sliding body is inserted between the two side plates, and the inner wall of the two side plates constituting the main body and the outer wall constituting the sliding body, respectively. The indwelling needle insertion hole forming pin mounting jig according to claim 1 or 2, wherein the sliding body is slidable forward of the main body by guide means formed in a sliding direction. Both ends of the two elastic arm-shaped spring members bent outward of the main body and the sliding body are fixed to the outer wall of the main body and the outer wall of the sliding body, respectively. The mounting jig for the indwelling needle insertion hole forming pin according to claim 1 or 2, wherein the sliding body is made slidable by a difference in distance between both ends. The indwelling needle insertion hole forming pin mounting jig according to any one of claims 1 to 4, wherein the sliding body is provided with a finger hook portion for sliding the sliding body along the main body.

Images